After having conversation with internal teams, below is the suggestion:
Specifically if you only want to increase your available SSD capacity, you can use either of the options highlighted below:
We recommend you to use the cost estimator to evaluate your compute/storage needs, and the estimated cost: https://dataexplorer.azure.com/AzureDataExplorerCostEstimator.html
Additional info: All SKU options are listed here: Select correct compute SKU for your Azure Data Explorer cluster | Microsoft Learn
Hope this info helps.
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